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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- <script>
        alert("hahha")
    </script> -->
    <!-- <input type="button" value="提交" onclick="alert('骗你的')"> -->
     <!-- <script src="./js.js"></script> -->
     <h1>这是demo1</h1>
</body >
</html >